Build Your Business With Open Source
PCM2 writes "InfoWorld this week is running a ten-page guide to building your business entirely with OSS. The guide highlights OSS alternatives for many enterprise applications categories such as CRM, ERP, content management, and so on. It's not exhaustive, but where it skips the obvious categories like databases and Web servers it includes some others that you might not expect."
The only quickbooks that I have used was a version for DOS back in 1995, so take my advice with a grain of salt. I haven't used this product myself, but Linux Canada makes Quasar a GPL'd accounting program. If you need it, you can buy tech support from them & if necessary you can buy the close source edition too.